For the pair of equations λ x + 3y = – 7, 2x – 6y = 14 to have infinitely manysolutions, find the value of λ
Question
For the pair of equations λ x + 3y = – 7, 2x – 6y = 14 to have infinitely manysolutions, find the value of λ
Solution
Para que el sistema de ecuaciones tenga infinitas soluciones, las dos ecuaciones deben ser proporcionales. Esto significa que los coeficientes de , y los términos constantes deben ser proporcionales entre sí.
Dadas las ecuaciones:
Primero, escribimos las ecuaciones en la forma estándar :
Para que las ecuaciones sean proporcionales, debe cumplirse:
Calculamos cada fracción:
Entonces, igualamos la primera fracción a las otras dos:
Para encontrar , multiplicamos ambos lados de la ecuación por 2:
Por lo tanto, el valor de es .
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